Monitoring a network path

Details Monitoring a network path Monitoring a network path

2004-09-02

2010-11-09

Ngo, Ricky (Department: 2464)

Multiplex communications

Diagnostic testing

Fault detection

C370S216000, C370S228000, C370S238000, C370S241000, C709S224000

Reexamination Certificate

active

07830806

ABSTRACT:
The present invention relates to the monitoring of paths along which signals are carried in a telecommunications network, in particular to determine if a path has been altered. Each path has a transit time associated therewith for data transport along that path. The method comprises the steps of: monitoring the difference between the transit time of a first signal path and the transit time of a second signal path, such that a change in the difference between the transit times of the two paths can be detected; and, in dependence at least in part on any such detected change, generating an alarm signal. The alarm signal can be used to indicate to a customer that one of the paths has been re-routed.

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patent: 2303996 (1997-03-01), None
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International Search Report.
International Search Report dated Dec. 13, 2004.
GB Search Report dated Nov. 11, 2003.

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